diff --git a/src/cmd/test/main.go b/src/cmd/test/main.go
index 8238c30..4a6a2af 100644
--- a/src/cmd/test/main.go
+++ b/src/cmd/test/main.go
@@ -3,7 +3,7 @@ package main
 import (
 	"github.com/surdeus/godat/src/mapx"
 	"github.com/surdeus/godat/src/slicex"
-	"github.com/surdeus/godat/src/llx"
+	"github.com/surdeus/godat/src/poolx"
 	"fmt"
 )
 
@@ -41,12 +41,12 @@ func main() {
 	fmt.Printf("%q\n", mapx.Reverse(m))
 	fmt.Printf("%v\n", mapx.Reverse(m1))
 	
-	ll := llx.NewComparable[int]()
+	ll := poolx.New[int]()
 	ll.Append(0)
 	ll.Append(1)
 	ll.Append(2)
-	ll.Set(1, 256)
-	ll.DelVal(256)
+	ll.Del(256)
+	ll.Del(1)
 	for p := range ll.Range() {
 		fmt.Println(p)
 	}
diff --git a/src/llx/main.go b/src/llx/main.go
index 621b89a..e62a8fd 100644
--- a/src/llx/main.go
+++ b/src/llx/main.go
@@ -25,18 +25,6 @@ type Pair[V any] struct {
 	V V
 }
 
-type ComparableLinkedList[V comparable] struct {
-	*LinkedList[V]
-}
-
-
-// Returns new empty linked list storing any COMPARABLE values
-// and adds a few more methods.
-func NewComparable[V comparable]() *ComparableLinkedList[V] {
-	return &ComparableLinkedList[V]{
-		New[V](),
-	}
-}
 
 // Returns new empty linked list storing the V type.
 func New[V any]() *LinkedList[V] {
@@ -111,22 +99,6 @@ func (ll *LinkedList[V]) Del(i int) (bool) {
 	return true
 }
 
-// Deletes the first appearance of the value in the list.
-func (cll *ComparableLinkedList[V]) DelVal(v V) bool {
-	i := 0
-	ll := cll.LinkedList
-	for p:= ll.before.next ; p != nil ; p = p.next {
-		if p.value == v {
-			ll.Del(i)
-			return true
-		}
-		
-		i++
-	}
-	
-	return false
-}
-
 // Push in the beginning of the list.
 func (ll *LinkedList[V]) Push(v V) {
 	prevNext := ll.before.next
@@ -161,6 +133,22 @@ func (ll *LinkedList[V]) Append(v V) {
 	ll.ln++
 }
 
+func (ll *LinkedList[V]) First() *Element[V] {
+	return ll.before.next
+}
+
+func (ll *Element[V]) Value() V {
+	return ll.value
+}
+
+func (ll *Element[V]) Next() *Element[V] {
+	return ll.next
+}
+
+func (ll *LinkedList[V]) Last() *Element[V] {
+	return ll.last
+}
+
 // Returns a channel of Pair that contains index and the value.
 func (ll *LinkedList[V]) Range() chan Pair[V] {
 	chn := make(chan Pair[V])
diff --git a/src/poolx/main.go b/src/poolx/main.go
index 425de03..c2dc1c7 100644
--- a/src/poolx/main.go
+++ b/src/poolx/main.go
@@ -10,14 +10,12 @@ import (
 
 type Pool[V comparable] struct {
 	store *llx.LinkedList[V]
-	keys map[V] int
 }
 
-// Returns new empty pool.
-func New[V comparable]() *Pool {
-	return &Pool{
-		llx.New[V]()
-		0,
+// Return new empty pool.
+func New[V comparable]() *Pool[V] {
+	return &Pool[V]{
+		store: llx.New[V](),
 	}
 }
 
@@ -25,6 +23,23 @@ func (p *Pool[V]) Append(v V) {
 	p.store.Append(v)
 }
 
+// Deletes the first appearance of the value in the list.
 func (p *Pool[V]) Del(v V) bool {
-	return true
+	i := 0
+	ll := p.store
+	for e := ll.First() ; e != nil ; e = e.Next() {
+		if e.Value() == v {
+			ll.Del(i)
+			return true
+		}
+		
+		i++
+	}
+	
+	return false
 }
+
+func (p *Pool[V]) Range() chan llx.Pair[V] {
+	return p.store.Range()
+}
+